// SPDX-License-Identifier: GPL-2.0-or-later
/*
* max9850 . c - - codec driver for max9850
*
* Copyright ( C ) 2011 taskit GmbH
*
* Author : Christian Glindkamp < christian . glindkamp @ taskit . de >
*
* Initial development of this code was funded by
* MICRONIC Computer Systeme GmbH , https : //www.mcsberlin.de/
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "max9850.h"
struct max9850_priv {
struct regmap *regmap;
unsigned int sysclk;
};
/* these registers are not used at the moment but provided for the sake of
* completeness */
static bool max9850_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX9850_STATUSA:
case MAX9850_STATUSB:
return true ;
default :
return false ;
}
}
static const struct regmap_config max9850_regmap = {
.reg_bits = 8 ,
.val_bits = 8 ,
.max_register = MAX9850_DIGITAL_AUDIO,
.volatile_reg = max9850_volatile_register,
.cache_type = REGCACHE_RBTREE,
};
static const DECLARE_TLV_DB_RANGE(max9850_tlv,
0 x18, 0 x1f, TLV_DB_SCALE_ITEM(-7450 , 400 , 0 ),
0 x20, 0 x33, TLV_DB_SCALE_ITEM(-4150 , 200 , 0 ),
0 x34, 0 x37, TLV_DB_SCALE_ITEM(-150 , 100 , 0 ),
0 x38, 0 x3f, TLV_DB_SCALE_ITEM(250 , 50 , 0 )
);
static const struct snd_kcontrol_new max9850_controls[] = {
SOC_SINGLE_TLV("Headphone Volume" , MAX9850_VOLUME, 0 , 0 x3f, 1 , max9850_tlv),
SOC_SINGLE("Headphone Switch" , MAX9850_VOLUME, 7 , 1 , 1 ),
SOC_SINGLE("Mono Switch" , MAX9850_GENERAL_PURPOSE, 2 , 1 , 0 ),
};
static const struct snd_kcontrol_new max9850_mixer_controls[] = {
SOC_DAPM_SINGLE("Line In Switch" , MAX9850_ENABLE, 1 , 1 , 0 ),
};
static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
SND_SOC_DAPM_SUPPLY("Charge Pump 1" , MAX9850_ENABLE, 4 , 0 , NULL, 0 ),
SND_SOC_DAPM_SUPPLY("Charge Pump 2" , MAX9850_ENABLE, 5 , 0 , NULL, 0 ),
SND_SOC_DAPM_SUPPLY("MCLK" , MAX9850_ENABLE, 6 , 0 , NULL, 0 ),
SND_SOC_DAPM_SUPPLY("SHDN" , MAX9850_ENABLE, 7 , 0 , NULL, 0 ),
SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer" , MAX9850_ENABLE, 2 , 0 ,
&max9850_mixer_controls[0 ],
ARRAY_SIZE(max9850_mixer_controls)),
SND_SOC_DAPM_PGA("Headphone Output" , MAX9850_ENABLE, 3 , 0 , NULL, 0 ),
SND_SOC_DAPM_DAC("DAC" , "HiFi Playback" , MAX9850_ENABLE, 0 , 0 ),
SND_SOC_DAPM_OUTPUT("OUTL" ),
SND_SOC_DAPM_OUTPUT("HPL" ),
SND_SOC_DAPM_OUTPUT("OUTR" ),
SND_SOC_DAPM_OUTPUT("HPR" ),
SND_SOC_DAPM_MIXER("Line Input" , SND_SOC_NOPM, 0 , 0 , NULL, 0 ),
SND_SOC_DAPM_INPUT("INL" ),
SND_SOC_DAPM_INPUT("INR" ),
};
static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
/* output mixer */
{"Output Mixer" , NULL, "DAC" },
{"Output Mixer" , "Line In Switch" , "Line Input" },
/* outputs */
{"Headphone Output" , NULL, "Output Mixer" },
{"HPL" , NULL, "Headphone Output" },
{"HPR" , NULL, "Headphone Output" },
{"OUTL" , NULL, "Output Mixer" },
{"OUTR" , NULL, "Output Mixer" },
/* inputs */
{"Line Input" , NULL, "INL" },
{"Line Input" , NULL, "INR" },
/* supplies */
{"Output Mixer" , NULL, "Charge Pump 1" },
{"Output Mixer" , NULL, "Charge Pump 2" },
{"Output Mixer" , NULL, "SHDN" },
{"DAC" , NULL, "MCLK" },
};
static int max9850_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
u64 lrclk_div;
u8 sf, da;
if (!max9850->sysclk)
return -EINVAL;
/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
sf = (snd_soc_component_read(component, MAX9850_CLOCK) >> 2 ) + 1 ;
lrclk_div = (1 << 22 );
lrclk_div *= params_rate(params);
lrclk_div *= sf;
do_div(lrclk_div, max9850->sysclk);
snd_soc_component_write(component, MAX9850_LRCLK_MSB, (lrclk_div >> 8 ) & 0 x7f);
snd_soc_component_write(component, MAX9850_LRCLK_LSB, lrclk_div & 0 xff);
switch (params_width(params)) {
case 16 :
da = 0 ;
break ;
case 20 :
da = 0 x2;
break ;
case 24 :
da = 0 x3;
break ;
default :
return -EINVAL;
}
snd_soc_component_update_bits(component, MAX9850_DIGITAL_AUDIO, 0 x3, da);
return 0 ;
}
static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_component *component = codec_dai->component;
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
/* calculate mclk -> iclk divider */
if (freq <= 13000000 )
snd_soc_component_write(component, MAX9850_CLOCK, 0 x0);
else if (freq <= 26000000 )
snd_soc_component_write(component, MAX9850_CLOCK, 0 x4);
else if (freq <= 40000000 )
snd_soc_component_write(component, MAX9850_CLOCK, 0 x8);
else
return -EINVAL;
max9850->sysclk = freq;
return 0 ;
}
static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
u8 da = 0 ;
/* set clock provider for audio interface */
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_CBP_CFP:
da |= MAX9850_MASTER;
break ;
case SND_SOC_DAIFMT_CBC_CFC:
break ;
default :
return -EINVAL;
}
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
da |= MAX9850_DLY;
break ;
case SND_SOC_DAIFMT_RIGHT_J:
da |= MAX9850_RTJ;
break ;
case SND_SOC_DAIFMT_LEFT_J:
break ;
default :
return -EINVAL;
}
/* clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break ;
case SND_SOC_DAIFMT_IB_IF:
da |= MAX9850_BCINV | MAX9850_INV;
break ;
case SND_SOC_DAIFMT_IB_NF:
da |= MAX9850_BCINV;
break ;
case SND_SOC_DAIFMT_NB_IF:
da |= MAX9850_INV;
break ;
default :
return -EINVAL;
}
/* set da */
snd_soc_component_write(component, MAX9850_DIGITAL_AUDIO, da);
return 0 ;
}
static int max9850_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
break ;
case SND_SOC_BIAS_PREPARE:
break ;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
ret = regcache_sync(max9850->regmap);
if (ret) {
dev_err(component->dev,
"Failed to sync cache: %d\n" , ret);
return ret;
}
}
break ;
case SND_SOC_BIAS_OFF:
break ;
}
return 0 ;
}
#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static const struct snd_soc_dai_ops max9850_dai_ops = {
.hw_params = max9850_hw_params,
.set_sysclk = max9850_set_dai_sysclk,
.set_fmt = max9850_set_dai_fmt,
};
static struct snd_soc_dai_driver max9850_dai = {
.name = "max9850-hifi" ,
.playback = {
.stream_name = "Playback" ,
.channels_min = 1 ,
.channels_max = 2 ,
.rates = MAX9850_RATES,
.formats = MAX9850_FORMATS
},
.ops = &max9850_dai_ops,
};
static int max9850_probe(struct snd_soc_component *component)
{
/* enable zero-detect */
snd_soc_component_update_bits(component, MAX9850_GENERAL_PURPOSE, 1 , 1 );
/* enable slew-rate control */
snd_soc_component_update_bits(component, MAX9850_VOLUME, 0 x40, 0 x40);
/* set slew-rate 125ms */
snd_soc_component_update_bits(component, MAX9850_CHARGE_PUMP, 0 xff, 0 xc0);
return 0 ;
}
static const struct snd_soc_component_driver soc_component_dev_max9850 = {
.probe = max9850_probe,
.set_bias_level = max9850_set_bias_level,
.controls = max9850_controls,
.num_controls = ARRAY_SIZE(max9850_controls),
.dapm_widgets = max9850_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
.dapm_routes = max9850_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
.suspend_bias_off = 1 ,
.idle_bias_on = 1 ,
.use_pmdown_time = 1 ,
.endianness = 1 ,
};
static int max9850_i2c_probe(struct i2c_client *i2c)
{
struct max9850_priv *max9850;
int ret;
max9850 = devm_kzalloc(&i2c->dev, sizeof (struct max9850_priv),
GFP_KERNEL);
if (max9850 == NULL)
return -ENOMEM;
max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
if (IS_ERR(max9850->regmap))
return PTR_ERR(max9850->regmap);
i2c_set_clientdata(i2c, max9850);
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_component_dev_max9850, &max9850_dai, 1 );
return ret;
}
static const struct i2c_device_id max9850_i2c_id[] = {
{ "max9850" },
{ }
};
MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
static struct i2c_driver max9850_i2c_driver = {
.driver = {
.name = "max9850" ,
},
.probe = max9850_i2c_probe,
.id_table = max9850_i2c_id,
};
module_i2c_driver(max9850_i2c_driver);
MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>" );
MODULE_DESCRIPTION("ASoC MAX9850 codec driver" );
MODULE_LICENSE("GPL" );
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